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HomeMy WebLinkAboutPWC Agenda 2022-02-15 and PacketAGENDA PUBLIC WORKS COMMITTEE February 15, 2022, 9:00 a.m. ZOOM Meeting: https://us06web.zoom.us/j/81695 207215 1. Approval of Minutes a. January 18, 2022 2. Member Comments/Concerns a. Consider Modifications to Agenda 3. Forest Home Pump Station #1 Report Presentation - HUNT Engineers - Thaete 4. Crest Lane - Land Acquisition - Thaete 5. Vehicle Restriction by Length for Forest Home and Sand Bank Road – Committee Recommendation - Slater 6. Local Law Chapter 250 - Penalties for Offenses, Consider Increasing Fines - Slater 7. Local Law Chapter 250-11 – Exclusions, Consider Additional Language to Exclude Public Transit, School Buses, Temporary Detour, etc. - Slater 8. 250-12 Signage (Update) - Attorney Revisions Making the Current 5-Ton Weight Restriction Sign Enforceable without Adding a Gross Vehicle Weight Sign - Slater 9. FEMA Floodplain Map Review – Thaete 10. Project Updates 11. Executive Session Future Agenda Items: • Water & Sewer Units • Discussion of Public Works Facility Survey – Howe • Conversation about Rates for Utility Customers that are on Private Water Wells but Connected to the Public Sanitary Sewer System. TOWN OF ITHACA PUBLIC WORKS COMMITTEE January 18, 2022, 9:00 a.m. Board and Staff Present: Rod Howe, Rich DePaolo, Rob Rosen, Joe Slater, Rich Ten Kate, Dan Thaete, Joe Talbut, Dave O’Shea, Mike Smith, Paulette Rosa, Travis Mills, Marty Moseley, Donna Shaw, Steve Riddle Guests: Bruce Brittain and Herb Engman for Forest Home; Leslie Schill, Jared Pittman, David Vanderpoorten, David Cutter, Dave Nardone representing Cornell University 1. Approval of Minutes: Minutes were approved from 12/21/21 by a motion from Mr. DePaolo, seconded by Mr. Howe. Carried. Mr. DePaolo questioned Item #6, 3rd sentence and stated that the draft policy does not reference the Public Works Committee review, it only references the Town Board approval. Mr. Howe replied that the topic will be addressed later in the meeting. 2. Member Comments / Concerns: None a. Consider Modifications to the agenda: Mr. Thaete added the topic of “Discussion Regarding the Cornell Interconnect Agreement”. 3. Cornell-Hoy Baseball Field Sewer Exemption Request – Thaete Mr. Thaete gave a summary of the request and explained that Cornell initially approached the town to hook into the sanitary sewer system for the new Hoy Baseball Field location at Game Farm Rd. At that time there were parts of the downstream collection system that were at or near capacity and there are no capital project upgrades planned on the current 5-year CIP. As a result, Cornell now wants to install an onsite septic/treatment system and is attending to request a sewer exemption. Leslie Schill presented their data collection and options considered to this point and outlined why Cornell is seeking an exemption from the sewer connection requirement. An onsite septic/treatment system is the most cost/timeline/feasibility-effective option. Mr. Howe asked if existing onsite treatment facilities could have been upgraded. Ms. Schill replied that it had not been considered, referencing NYSEG easement issues. Mr. DePaolo asked if Cornell is considering future sewer needs in these areas when making current decisions. Ms. Schill responded that expansion plans and priorities have changed due to COVID, administrative changes, and public input. Mr. DePaolo emphasized that constrained areas and upgrades to the system be explored when considering future projects. Mr. Howe agreed and stated that the issue will need to be addressed more fully in the future. Committee members were in favor of recommending the exemption approval to the Town Board. 4. Truck Traffic Restriction by Length (Forest Home/Sand Bank Rd) – Slater Mr. Slater reported that a meeting was held with a NYSDOT representative to answer questions from last month’s meeting. A length restriction sign can be placed below the weight restriction sign to identify the horizontal geometry hazard at upper Forest Home Dr. between Caldwell and Warren Rds. We cannot prohibit local delivery traffic from utilizing roads in both the Forest Home and Sand Bank areas as NYS law prohibits any restrictions for local delivery on segments of road that are restricted in any way. Weight restriction signs are enforceable without the gross vehicle weight being indicated on the sign. Mr. Slater is still pursuing answers to additional questions from legal counsel. He recommended updating Local Laws and drafting legislation around this issue. There is a meeting with TCAT later this week regarding the 5-ton weight restriction. Updates to follow. 5. Continued Discussion of the Utility Refund Policy - Slater This item will be held and be addressed at the February meeting. It is noted that more refinement of criteria is needed for the policy and procedure. “Courtesy” terminology may be removed. Mr. DePaolo questioned the limit on the number of times that someone can receive an adjustment if the request is legitimate. 6. Crest Lane – Land Acquisition - Thaete Mr. Thaete presented a map of the area. The town owns a land-locked parcel which was intended for a town vehicle turnaround. Currently, town vehicles turn around in a nearby privately-owned driveway to the north that has had to be repaired by the town in the past and is likely due again. The public does not have the rights to utilize the southern parcel for access to the nearby subdivision and trespasses to access the subdivision. The owner of the southern adjoining parcel is willing to sell a small section to the town that will aid in allowing the town to access the land-locked parcel and to allow public access to the subdivision. Mr. Thaete asked for permission to speak with counsel and continue to pursue the parcel. A smaller parcel north of the of said parcel is also needed to complete the turnaround. This parcel is where the public access was intended for the subdivision, but there is no driveway. He has not yet spoken with owners about the other small parcel needed. Mr. DePaolo asked if there is any clearing needed or have there been any conversations about aesthetical concerns with residents. Mr. Thaete has not had those discussions. Mr. DePaolo referenced a similar situation in the town that utilized a privately-owned driveway and asked if it made more sense to enter into an agreement with the owner and continue to use the driveway. Mr. Thaete felt that pursuing the purchase of the parcels is the better option. The Committee was in favor of moving forward to gather information and Mr. Thaete will keep the Committee updated. 7. Discussion Regarding Cornell Interconnect Agreement – Thaete Mr. Thaete shared a map of the location of the Cornell North Campus interconnect. Due to deficiencies in the Cornell system, the interconnect was installed so the town could provide water to the North Campus and assist in maintaining adequate quality and flow to the North Campus. The town currently charges Cornell the bulk rate of $5.77/1000 gallons, but the North campus project is not fully occupied. Per a past Agreement, Cornell provides water to the Forest Home Community, via the town’s system. Cornell charges the town the bulk rate of $9.24/1000 gallons. Cornell had previously requested the town charge Cornell the Town’s bulk rate for water through the interconnect since Cornell charges the town their bulk rate for Forest Home. However, there is a rather large discrepancy between water bulk rates. Discussion was held regarding water usage comparatively. Usage is anticipated to increase in the North Campus area. Mr. Thaete feels that the Agreement with Cornell should stipulate equal rates between entities. Mr. DePoalo recalled the decision to assess their usage one year after full occupation and stated that it doesn’t make sense to craft a final agreement until the full occupancy usage is realized. He felt that the discrepancy in the rates needs to be codified in the Agreement regardless. Mr. Thaete reported that the Agreement needs to be finalized prior to occupation. Terminology to reevaluate rates after occupancy would need to be included. He asked how the Committee felt about terminology that any water usage above what is used at Forest Home will be at the town’s customer rate. Mr. Slater emphasized that the town could provide water to Forest Home at a customer rate of $8.51/1000 gallons vs. Cornell’s bulk rate of $9.24/1000 gallons. A consensus was reached that Cornell should be billed same rate for water through the interconnect as Cornell charges the town for water usage in Forest Home. The Agreement needs to be completed in the next few months. Mr. Thaete will approach Cornell about a matching rate for the Agreement. He will report back to the Committee in February. 8. Project Updates – Thaete/Slater a. Thaete - Working on Capital Projects for 2022, such as the Ridgecrest Upgrade Project. The King/Troy Road Water Project is lingering from 2021. Forest Home Walkway was awarded and will be commencing in the spring. Currently meeting on a weekly basis to work on the water/sewer matrix to prioritize projects. Mr. Howe reminded the group to keep ARPA funds in mind. b. Slater - Sewer-only rates for 20 customers need to be addressed. Saunders Park drainage issues are being worked out. The project will continue in the spring. The meeting was adjourned at 10:26 a.m. Our next meeting is scheduled for 2/15/22. lvp § 250-10 Penalties for offenses. (Existing) A violation of this article shall be a traffic infraction. Every person convicted of a violation of any of the provisions of this article shall for a first conviction be punished by a fine of not more than $50 or by imprisonment for not more than 15 days or by both such fine and imprisonment; for a second such conviction within 18 months thereafter such person shall be punished by a fine of not more than $100 or by imprisonment for not more than 45 days or by both such fine and imprisonment; upon a third or subsequent conviction within 18 months after the first conviction such person shall be punished by a fine of not more than $250 or by imprisonment of not more than 90 days or by such fine and imprisonment. § 250-10 Offenses; Penalties for Violations. (Proposed) A. All provisions of New York State law generally and procedurally applicable to misdemeanors shall apply to any criminal proceeding brought under this chapter, and any misdemeanors shall be deemed unclassified misdemeanors. For purposes of this chapter the town’s justice court is hereby vested and imbued with jurisdiction to issue administrative and other warrants in compliance with the New York Criminal Procedure Law and administrative codes of the State of New York, as well as to hear and adjudicate allegations relating to the criminal violation of this chapter, and to thereafter, if appropriate, impose any fine, penalty, sentence, or sanction. B. First offense. Any person or entity that violates, or fails to comply with, any of the provisions of this chapter shall be guilty of a criminal violation and subject to a fine of not less than $100 and not more than $300, or by imprisonment for not more than 15 days, or both such fine and imprisonment. C. Second offense. Any person or entity that violates, or fails to comply with, any of the provisions of this chapter within 18 months of any prior judicial finding or conviction under this chapter shall be guilty of a second offense. Any person or entity that commits any second offense shall be guilty of a violation and subject to a fine of not less than $200 and not more than $500, or by imprisonment for not more than 15 days, or both such fine and imprisonment. D. Third offense. Any person or entity that violates., or fails to comply with, any of the provisions of this chapter within 18 months of any prior judicial finding or conviction under this chapter of a second offense, shall be guilty of a third offense. Any person or entity that commits any third offense shall be guilty of an unclassified misdemeanor and subject to a fine of not less than $500 and not more than $2,500, or by imprisonment for not more than 120 days, or both such fine and imprisonment. E. Each week that any noncompliance or violation continues is and may be charged as a separate violation. In addition to any other remedy, a violation of, or noncompliance with, this chapter may result in the termination, modification, or revocation of any permits or approvals as issued. F. The application or pursuit of any civil or criminal fine, sanction, or penalty shall not preclude the pursuit of any other lawful remedy by the town, including, but not limited to, the right to seek equitable relief. Whenever the town shall believe from evidence satisfactory to it that there is any violation of, or non-compliance with, this chapter, the town may bring an action to enjoin and restrain the continuation of such violation. In any such action: (a) preliminary relief may be granted under Article 63 of the Civil Practice Law and Rules; and (b) the town shall not be required to post any bond or undertaking, prove that there is or will likely be irreparable harm, or prove that the town has no adequate remedy at law. In any such action, the court may also award any damages or other relief requested, including declaring the rights and interests of any parties and imposing restitution or damages. The remedies provided by this chapter shall not be in lieu of, and shall be in addition to, any other right or remedy available to the town, whether sounding in law, equity, enforcement or otherwise. § 250-11 Exclusions. (Existing) Local deliveries and pickups to and from properties located on the aforementioned Town highways, by vehicles otherwise prohibited from using said highways by the provisions of this article shall not be prohibited hereby. Further, fire-fighting equipment and vehicles, and emergency medical service vehicles, otherwise prohibited from using such highways by the provisions of this article shall not be prohibited hereby. § 250-11 Exclusions. (Proposed) This local law shall not apply to: (i) local deliveries and pickups to and from properties located on the aforementioned town highways by vehicles otherwise prohibited from using said highways by the provisions of this chapter; (ii) sound agricultural operations and practices (as defined and construed in and by New York State Agricultural District Law) and the related movement of agricultural products when this restriction applies within a NYS certified agricultural district; (iii) school buses, related educational transportation vehicles, and municipally owned or sponsored mass transit, including TCAT busses; (iv) law enforcement vehicles; (v) ambulances and fire trucks, and vehicles owned and operated by municipalities or fire companies on emergency or official municipal or fire-fighting business; (vi) military vehicles; (vii) maintenance, repair, and service vehicles owned and operated by a utility company or public authority while on official business, but excluding any pipeline transportation companies and similar entities that are not engaged in providing services to nearby residential and business structures; and (viii) municipal and other governmental vehicles engaging in maintenance, repairs, or the provision or performance of any municipal service, together with those vehicles contracted for such services by any municipality or governmental unit. Instrument Number *581298-001* Aurora R.Valenti TOMPKINS COUNTY CLERK 320 North Tioga Street Ithaca,NY 14850 (607)274-5431 Fax:(607)274-5445 Delivered By: TG MILLERS Receipt No.581298 Return To: Date:09/29/2011 Time:10:39 AM Document Type:MAPS PartiesToTransaction:LITTLE Town/City: Deed Information Mortgage Information Taxable Mortgage Amount:Taxable Consideration: State Transfer Tax:Basic Mortgage Tax: County TransferTax:Special Mortgage Tax: RETT No.:Additional Mortgage Tax: Local Mortgage Tax: State of New YorkTompkinsCountyClerk Mortgage Serial No.: This sheet constitutes the Clerk endorsement required by Section 316-A(5)&Section 319 of the Real Property Law of the State of New York. Tompkins County Clerk Please do not remove this page. 5 8 12 9 0 0 18 "4 JSAYLE/COMSTOCK (R.0.\798/332 |ILEGEND*-IRON STAKE FOUND,LABELED-PIN SET WITH CAP-UTILITY POLE^-TELEPHONE PEDESTAL RIGHTS OF INGRESS ScEGRESSINCLUDEDOVERTHIS20'STRIP TO LANDSEASTERLYANDNORTHERY v 44.70'IS88747*12 E TOWN OF ITHACA'SEE 799/161ILOT3LOT1§UiLOT4ASPHALTDRIVE d5|SCM’o KCORNELL UNIV.(R.O.)787/29330'R/W FOR:INGRESS &EGRESS |5 TO LANDS NORTHt^OF LOUCKS,CORNELLPUNIVERSITYANDoGAYLE/COMSTOCKLOT2iLARGEPIPEFOUND\VPRESENTINTERSECTIONOFCENTERLINES PIPE FOUND 0.30'SOUTH OF CORNERN88747*12 \N67.00'oN88*47*12**W TIE=N 88'47’12"W Z57.85'OH 125.00*O.H4H $PIPE KFOUND§END OF DEEDEDPUBLICSTREET.SEE 347/40—210'±Y LARGE PIPEdCMFOUNDCREST'LANE 40'WIDE STREET DEEDED PRESENT EDGE PAVEMENTTOTHETOWNOFITHACASEEDEEDBK347'PAGE 40CENTERLINE (0APPROXLOCATIONGASLINE.612/204 57.85*END OFPAVEMENTGG i®APPROX.LOCATION_SEWERUNE\v G —GPRESENTEDGEPAVEMENT25X 13-00‘ASPHALTDRIVE N 88'47’12”Wl »ftO174.64’SO.00S88‘47’12”EPIPEASPHALTDRIVE N 0V 12'4899 RAILROAD SPIKE-FOUND 0 2'SE'RLY OF CORNER1%FOUND FOUNDPIPEFOUND041’ NORTH OF CORNERt 20.00*o>PERMANENTEASEMENT FOR \__SEWERLINETOWWN OFITHACA,SEE562/628 b tooGARAGE-CURRENT DEED TO LITTLE DOES NOTRESERVERIGHTSOFINGRESSScEGRESS TO BENEFIT OTHERS OVER THIS GRAVELtODRIVE.PRIOR DEEDS INCLUDE RIGHTS OFINGRESSScEGRESSOVERPROPOSEDROADSHAREDWITHADJOININGOWNERS. S CAR criCOI3 U»LuftOPIPORTls0'±HOI /HOUSE/.NO.111iLOT6 §itfNO.103 PIPE RANDOLPH S.LITTLEJOANNM.LITTLE DEED BOOK 764 PAGE 204 TAX MAP No.66-3-26 AREA—0.603 ACRES TO STREET UNE CfcUJ0.FOUND kit*$5Bialu5APPROXLOCATION GASLINESEE373/584 PORCH**iCM-33 2’±-<oRANDOLPHS.LITTLE JOANN M.LITTLE DEED BOOK 611 PAGE 450 TAX MAP No.66-3-25 AREA=0.631 ACRES TO STREET UNE <0 inItup%o LOT 7 OLD WIRE FENCEONPROPERTYUNE CORNELL UNIVERSITY (R.O.)oLOT5Oi 246/263IrIMANNING(R.O.) 495506-001 I©I4*•c-<0 SHEDpTl SHEC END LATTICE FENCE’l.8*±NORTH OF LINE 5I $2 -oegzrnWc/T—• END LATTICE FENCE 0.6'±NORTH OF UNE PIPE FOUND9FENCECORNER jo SHED £•* 148.69*TALL PIPEFOUND190.88*S88*09*35'*W %>MANHOLE 51.70S8809'35"W 123.21 <*-‘*ro oPIPEFOUND0.4‘NORTHOFFENCE 4.4—\i'0rneraVO PIPEFOUND J3»2CM4PREFERENCES: 1)PLANOFLOTSFORMRS.MARYW.WARRENN-DATED12/1/1948BYJ.C.McCURDY. 2)SURVEYMAPNO.104HALCYONHILLROAD DATED9/27/2005BYT.G.MILLER,P.C. 3)SURVEYMAPNO.103CRESTLANEDATED 7/6/2006BYT.G.MILLER.P.C. 4)SURVEYMAPFORMERLYLANDSOFHERTEL, NOWLANDSOFLOUCKSANDERICKSONDATED 12/26/1995ANDAMENDED11/20/1996BYT.G.MILLER,P.C. -n\-<«-oH0DGEN/INMAN (R.O.) 475993-001 o••mGALLOWAY(R.O.)705/281 03 mO10vOI33 ALTERATION OF TH6 MAP NOTCCNFORMffttTOSECTION7206,SUBDMSttN 2,NEW YORK STATEEDUCATIONUW.GY LAW.ALL CERTIFICATIONSHEREONAREYAIJDFORIMS MAPANDCORESTHEREOFONLYFSA©MAP OR CORES BEAR THE REPRESSIONSEALOFTHELICENSEDLANDSURVEYORWHOSESKNATUREAPPEARSHEREON. I ARE PROMOTED NOTES 1).THIS SURVEY IS SUBJECT TO ANY STATE OF FACTS AN ACCURATE UP-TO-DATE ABSTRACT OF TITLE MAY SHOW. REVISEDTITLE: RANDOLPHS.LITTLECERTIFICATION JOANNM.LITTLEIherebycertifytothatIamalicensedlandsurveyor,NewYork State License No.050096,andthatthismapcorrectlydelineates an actualsurveyonthegroundmadebymeor under my direct supervisionandthatIfoundnovisibleencroachments either wayacrosspropertylinesexceptasshownhereon NO.111 —115 CREST LANET.C.MILLER P.C. TOWN OF ITHACA,TOMPKINS COUNTY,NEW YORKENGINEERSANDSURVEYORS 203 NORTH AURORA STREET ITHACA,NEW YORK 14850 TEL (607)272—6477 DATE:,8/24/2011 SCALE:r=4o9DATED:SIGNED:Si 1554 3sm 1 Daniel Thaete From:Jennifer Loucks <jenniferleeloucks@gmail.com> Sent:Wednesday, February 02, 2022 8:58 PM To:Daniel Thaete; Joe Slater Cc:Daniel Peter Loucks Subject:Re: Extending Crest Lane to the East Hi Dan and Joe, (and cc Pete Loucks) Thanks again for coming out to 116 Crest Lane on a cold morning so that my dad and I could better understand and visualize the possible extension of Crest Lane and hammerhead turnaround. We appreciate it. I thought it might be useful to follow up with an email, to affirm: We, Loucks, would rather formalize an agreement to give the Town access to as much of our driveway as you need for a turnaround -- and are happy to do so -- than cede land from the southern 20-ft strip of our property. (As we mentioned, we had been thinking about redoing our driveway and were going to look into using stone or grass pavers -- something permeable to reduce runoff. If, eventually, the PWC approves using our driveway as a turnaround, we could discuss further about what kind of design would best accommodate large plows.) Let us know if you came away from our meeting with a different understanding, or if you need more information, and we'll plan on attending the next PWC meeting. Best, Jennifer Loucks Tax ParcelsExisting Flood Hazard Area1% Annual Chance Flood Hazard boundary0.2% Annual Chance Flood Hazard boundary2022 Draft Flood Hazard Area1% Annual Chance Flood HazardRegulatory Floodway0.2% Annual Chance Flood HazardFEMA 2022 Draft Flood InsuranceRate Map for the Town of Ithaca¯0120.5MilesThe Federal Emergency Management Agency (FEMA) and STARR II, FEMA’s mappingpartner, have finalized the draft Flood Insurance Rate Map (FIRM) database forTompkins County, New York. Completing this draft database concludes the collectionand analysis of the initial engineering data for your community,and provides the bestavailable representation of where water will collect and flow during a flood, based oncurrent conditions.The draft FIRM database includes proposed Special Flood Hazard Areas (SFHAs) thatwill be mapped on the FIRM for your community. An SFHA is an area subject toinundation by the 1-percent-annual-chance flood – also called the base flood. Overtime, water flow and drainage patterns can change due to surface erosion, land usedevelopment, and other factors. These factors may affect the likelihood of flooding incertain areas of your community. As a result, SFHA boundaries and zone types mayhave changed.Your community will have 30 days after the Flood Risk Review Meeting to review thedigital workmaps and provide additional data to supplement or modify the underlyingdraft FIRM database. Any data you provide must be consistent with currentengineering principles. Please send additional data or comments on the digitalworkmaps to the FEMA Region II staff identified below. Your community will haveseveral additional opportunities to provide feedback on the resulting SFHAs and otherflood hazard information before the data is finalized.FEMA wants your community to have the most current and accurate flood riskproducts possible. We rely on your feedback, partnership, and knowledge to bestcharacterize flood risk in your community, in support of your efforts to reduce thoserisks. We look forward to working with community officials and other stakeholders inTompkins County to increase flood risk awareness and reduce the risks to lives andproperty from flooding. Your initial comments and suggestions will not affect yourcommunity’s ability to provide feedback later, or to formally appeal the flood hazardinformation during the future appeal period.Map prepared 1/31/2022 by Town of Ithaca Engineering with data from FEMA andTompkins County GIS ENGINEERING REPORT for FOREST HOME #1 PUMP STATION IMPROVEMENTS TOWN OF ITHACA,TOMPKINS COUNTY,NEW YORK September 2021 Revised February 2022 HUNT 3367-001 HUNT ,—I ARCHITECTS I SURVEYORS Prepared by: Hunt Engineers,Architects,Land Surveyors &Landscape Architect DPC Airport Corporate Park 100 Hunt Center Horseheads,NY 14845-1019 Phone (607)358-1000,Fax (607)358-1800 TABLE OF CONTENTS I.PROJECT BACKGROUND II.EXISTING FACILITIES A.Collection System B.Pump Stations C.Population Trends and Growth III.NEED FOR PROJECT A.Health,Sanitation,and Safety B.Aging Infrastructure C.Pump Station Condition and Compliance with Standards 1.Wet Well 2.Force Main 3.Pumps 4.Electrical Components 5.Flow Measurement 6.Emergency Storage IV.PROPOSED IMPROVEMENTS A.Alternate Analysis -Do Nothing B.Recommended Actions 1.Pump Station Improvements 2.Force Main Rehabilitation 3.Infiltration and Inflow C.Cost Estimate V.PROJECT SCHEDULE VI.CONCLUSION 1 1 1 1 2 3 3 3 3 3 5 6 7 7 7 8 8 8 8 8 8 9 11 11 TABLES Table 1:Forest Home Growth Table 2.Expected Forcemain Velocity and Head Loss for 350 GPM Pumps Table 3:Cost Estimate Table 4:Cost Estimate Alternate Table 5:Project Schedule 3 6 9 10 11 FIGURES Figure 1:Valve chamber deterioration 4 APPENDICES Appendix A:Service Area Map Appendix B:Townwide Sanitary Sewer System Study (Larson Design Group,2019) Appendix C:Pump Cycle Time Calculations Appendix D:Flygt Pump Curve n Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 I.PROJECT BACKGROUND Hunt Engineer Architects,Land Surveyors,&Landscape Architects,DPC (HUNT)undertook a study of the Town of Ithaca’s Forest Home Pump Station to assess areas of noncompliance within the system.This report will analyze the existing pump station,identify deficiencies,recommend corrective action,and provide a preliminary cost estimate for undertaking improvements. The study was conducted in the Town of Ithaca,situated on the southernmost edge of Cayuga Lake in Tompkins County,New York.The Town of Ithaca currently owns and maintains approximately 68 miles of 6-inch to 15-inch gravity sewer mains,9,500 linear feet of 4-inch to 8-inch sewer force- main,1,700 sewer manholes,and 11 sewer pump stations.Together,these systems convey approximately 2.3 million gallons per day of sewage to the City/Town jointly owned interceptors; thereby,transported and treated at either the Ithaca Area Wastewater Treatment Facility (IAWWTF)or the Village of Cayuga Heights Wastewater Treatment Plant (VCHWTP). The Forest Home Pump Station,located within the Town near the Cornell University Campus, consists of a concrete wet well with two submersible style pumps,valve pit,and above grade controls and telemetry.The pump station discharges through a 6-inch ductile iron main that is approximately 1,100 feet long and gains 97 feet in elevation.Due to age of the pump station and force main,the Town is taking proactive measures to maintain the existing pump station in conjunction with planned changes within the roadway to alter traffic patterns.Completing necessary changes to the pump station and force main will allow the system to achieve regulatory compliance,secure the health and safety of end users,and minimize operation and maintenance costs and requirements.Resolving pump station inefficiencies is a cost-effective way to ensure the existing infrastructure can withstand future growth and while maintaining operation within permit limits. II.EXISTING FACILITIES A.Collection System The Town of Ithaca owns and operates the Forest Home sanitary sewer collection system. Installed in the 1970s,it contains 71 manholes,5 pump stations,and approximately 11,400 linear feet of 8-inch to 10-inch gravity main.The collection system is made up of three subsections:Warren Road,The Byway,and Forest Home.Together,these sections serve approximately120 users.Upgrades and replacements have been made to portions of the system over the years to keep it in service.However,several components are quickly approaching the end of their useful service life. B.Pump Stations The Forest Home Pump Station is the last pump station of the collection system before wastewater is discharged to the greater Cornell/Town of Ithaca collection system.Two sewer pump stations,Caldwell Hill and McIntyre,discharge to the Forest Home pump station along with portions of Cornell University facilities.This makes the Forest Home Pump Station a critical facility with respect to functionality of the greater collection system.Refer to Appendix A for mapping of the service area. 1 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 Caldwell Hill Pump Station Caldwell Hill Pump Station serves approximately 15 users on the southern side of Fall Creek, including the Cornell Water Filtration Plant.This sewer pump station was constructed in 1977 and consists of two 2.4 hp pumps and nearly 400 linear feet of 4-inch force main.It operates an average of 1.6 hours per day and pumps approximately 19,000 gallons of flow each day. McIntyre Pump Station McIntyre Pump Station is located in the southwest corner of Forest Home,near the Cornell Botanic Gardens.It services approximately 20 users located off the southwestern side of Forest Home.This station was installed in 1977 and has two 10 hp pumps connected to nearly 750 linear feet of 4-inch force main.The station runs an average of 0.1 hours per day and conveys over 2,000 gallons of flow each day. Forest Home Pump Station The Forest Home Pump Station is the largest station located in the community of Forest Home and is the pump station under consideration in this study.It services the entire Forest Home area,including discharge from Caldwell Hill and McIntyre pump stations as well as portions of Cornell University.Located at the intersection of Forest Home Drive and Pleasant Grove Road, this pump station was installed in 1977.This duplex pump station is 6 feet in diameter and is 13.5 feet deep.There is currently one 23 hp pump (Pump #1)and one 20 hp pump (Pump #2) which collectively pump approximately 35,000 gallons of flow each day.The station discharges through a 6-inch ductile iron force-main that is approximately 1,100 feet long and gains 97feet in elevation.The system contains a variable frequency device (VFD)that is used for soft starts and shutdowns to protect the pumps against cavitation and water hammer. C.Population Trends and Growth A Townwide Sanitary Sewer System Study was conducted in 2019 by Larson Design Group (LDG),which determined current and anticipated future flows (Appendix B).Anticipated growth in sewage production for the Forest Home pumpstation alone (excluding contributions from upstream pump stations)can be found in Table 1.These numbers are based on future build out projections,including existing infill (currently served parcels with little or no metered water usage which are likely to be built up or subdivided)and future development.The LDG projection is used as the basis for pump station capacity,as this study period is likely around the proposed 15-year lifespan of the rehabilitated system. 2 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 Table 1:Forest Home Growth PRODUCTION (GPD)YEAR 10,4812018 11,720FutureGrowthPerLDG III.NEED FOR PROJECT A.Health,Sanitation,and Safety Improvements to the Forest Home Pump Station are needed to provide adequate conveyance of sanitary waste to the wastewater treatment plants.Pump failure may result in sewer overflows or flooding which would be detrimental to the health and safety of the community and surrounding environment.Furthermore,system upsets could create further problems for serviceability.Maintaining pump stations in good working order and in compliance with relevant standards will help secure health,sanitation,and safety for the community. B.Aging Infrastructure The original collection system was installed in the 1970s,with improvements to the system made over the years.The system under consideration is comprised primarily of 6-inch ductile iron force main,which has experienced breaks and shows evidence of inflow and infiltration (I/I). The Forest Home Pumps were installed in 1977.However,with approximately 8,800 hours of logged on each pump,they have exceeded their expected service life.If repairs are prolonged, the Town risks sudden shutoff of the system with no backup infrastructure in place. C.Pump Station Condition and Compliance with Standards Ten State Standards and TR-16 have been utilized to review pump station compliance with recommended standards,as well as National Electric Code.The following section reviews each aspect of the pump station and outlines areas in need of improvement. 1.Wet Well The wet well was observed to be in good condition;there were no visible signs of cracking in the concrete nor evidence of inflow and infiltration into the structure.Weaknesses were limited to the hatch and valve pit,both of which will need replacing.The valve chamber is showing significant signs of deterioration.The Town should plan to replace it to ensure peak performance of the pump station. 3 7 𝐺𝑃𝑀∗24 �𝑟+105 𝐺𝑃𝑀∗1.6 �𝑟+160 𝐺𝑃𝑀∗0.1 �𝑟 24 �𝑟=14.7 𝐺𝑃𝑀 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 Figure 1:Valve chamber deterioration According to paragraph 42.62 of the Ten State Standards,a wet well should be sized such that it takes no longer than 30 minutes to fill based on average design flow.Knowing the current average flow rate from Forest Home gravity contributions is 7 GPM,the Caldwell pump runs at 105 GPM at 1.6 hours per day,and the McIntyre pump runs at 160 GPM for 0.1 hours per day,the average daily flow rate is: Therefore,the maximum wet well volume to achieve the 30-minute fill time limit is 14.7 GPM x 30 min =440 gallons.The current wet well inner diameter is 6 ft,and has a usable volume of 1,460 gallons,exceeding maximum 30-minute fill time volume.The current low water level is set at an elevation of 813.5 ft,with the force main exiting at 820.4 feet.By setting the low water level to 2.1 feet below the force main,the usable volume becomes 440 gallons. One of the most critical components of wet well sizing relates to pump cycle time.A maximum of ten cycles per hour is recommended for most pumps to maximize longevity and minimize pump maintenance and repair.The worst-case scenario for pump cycle time 4 (346 𝐺𝑃𝑀=5.76 𝐺𝑃𝑆) 7.48 𝑓𝑎𝑙 𝑐𝑟.𝑓𝑟.∗ 𝜋(6.28 �ℎ𝑛 12�ℎ𝑛/𝑓𝑟)2 4 =3.58 𝑓𝑟 𝑟 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 occurs at the peak future influent flow.The future flow from all sources can be estimated to be (11,720/10,481 -1)=12%higher than the existing flow,based on the growth expectation set forth in the LDG report.The peak flow can be estimated using a peaking factor of 6.Hence,the expected peak future flow is 14.7 GPM *1.12 *6 =98.8 GPM.The current time to fill the existing wet well at this flow rate is 440 gal/98.8 GPM =4.4 minutes (or 15 minutes at the existing usable volume).The Town desires to have a pump that can meet the future peak instantaneous flow from the Caldwell and McIntyre pump stations (105 GPM and 160 GPM respectively,assuming only one pump is running for each), combined with the peak Forest Home gravity flow (8 GPM*6 =48 GPM).This totals 313 GPM,giving a wet well empty time of 440 gal/(313 gpm -98.8 GPM)=2.1 minutes. Therefore,the number of cycles for a single pump at Forest Home operating at 313 GPM is 60 min/(4.4 min +2.1 min)=9.2 per hour.Any pump size 313 GPM or greater will meet the cycling requirement.Expected cycling times for various operational scenarios are provided in Appendix C. Knowing that the Caldwell Hill pumps have an average run time of 1.6 hours/day,and the McIntyre pumps have an average run time of 0.1 hours/day,it is assumed that these pumps will not need to be upsized in the near future.This is likely true even when accounting for future growth.It is also not expected that they will run at the same time very often. The pumps at Forest Home currently operate approximately 600 gpm below and 40 ft of TDH above their BEP,which reduces efficiency and increases operation and maintenance costs.A drawdown test was performed on August 31,2021,showed the 23 hp Flygt pump operating at 346 GPM and the 20 hp Flygt pump operating at 263 GPM.The maximum pump rates are significantly higher than the average influent flow and is recommended to design the replacement pumps to each operate at the average influent flow and allow both pumps to kick on during high flows.It is proposed that the existing pumps be replaced with Two (2)-25 hp Flygt pumps with MultiSmart pump controllers,capable of conveying waste at a rate of approximately 350 GPM each.These pumps would besufficient to handle all expected flows into the wet well and increase operating efficiency.The Flygt pump curve is provided in Appendix D. 2.Force Main The discharge force main is a 6”ductile iron pipe (inside diameter of 6.28”for as assumed Class 52 pipe).Based on the maximum flow rate provided by the drawdown test for the existing 23 hp pump at Forest Home,fluid within the force main is currently flowing at a maximum velocity of: 5 (263 𝐺𝑃𝑀=4.38 𝐺𝑃𝑆) 7.48 𝑓𝑎𝑙 𝑐𝑟.𝑓𝑟.∗ 𝜋(6.28 �ℎ𝑛 12�ℎ𝑛/𝑓𝑟)2 4 =2.72 𝑓𝑟 𝑟 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 When running the existing 20 hp pump,the velocity is: Section 49.1 of the Ten State Standards recommends a minimum velocity of 2 feet per second (ft/s)to prevent solids deposition and a maximum velocity of 8 ft/s to avoid high head loss.Settling was not observed to be an issue during operation,and these flows are well within the recommended range.Should the pumps be resized to 350 GPM,expected velocity and head loss in both a 4”and 6”DIP is summarized in Table 2,and detailed calculations are shown in Appendix C. Table 2.Expected Forcemain Velocity and Head Loss for 350 GPM Pumps 4"6"6" Number of Forest Home Pumps Running Forcemain Flow Rate (GPM) 4"Forcemain Velocity (ft/s) Forcemain Headloss Forcemain Velocity (ft/s) Forcemain Headloss (ft)(ft) 1 350 8.0 73.4 3.6 10.6 2 700 16.1 265.0 38.3 140.6 Note that the velocity requirement is met for both a 4”and 6”force main with only 1 pump is running. 3.Pumps The pump station contains two Flygt submersible style pumps,a 23 hp (Pump #1)and a 20 hp (Pump #2).During the August 2021 site visit,significant leaking was observed at the seal of at least one of the pumps on the discharge side when the wet well was drawn down. This caused spraying of pumped water back into the wet well,leading to redundant pumping.These components must ultimately be replaced to avoid further wear and tear on the elbow and pump. The approximate service life for municipal pumps is approximately 5,000 pumping hours with proper maintenance.The Forest Home wet well VFD allows the well to perform soft starts and shutdowns protecting the pump against cavitation and water hammer.The pumps are also alternatively operated to prolong life and balance wear.Both actions act as preventative maintenance,extending pumps service life.However,with approximately 6 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 8,500 pumping hours on each pump it is recommended that they be replaced.Furthermore, TR-16 Section 3.2.3 recommends that pump stations maintain consistency in pump sizing; where two pumps are provided the units should be the same size.This standard is not met for the current pump station. Performance of this pump station is less than optimal.As shown in the Flygt Pump Curve given in Appendix D,the Best Efficiency Point (BEP)for a 23 hp pump is approximately 56%.Ideally a pump would not operate at greater than +/-10%points from the BEP to ensure longevity and minimal maintenance and repair.Based on the observed 346 GPM maximum flow rate,the pump operates at best around 36%efficiency.The efficiency point is 38%for the smaller pump,also far from the BEP of 61%. New Flygt pumps with MiltiSmart controllers should be selected to bring the pump operating conditions closer to the BEP of the selected pumps.Based on the total dynamic head for each flow scenario and force main size analyzed in Appendix C,a 4”force main requires a pump capable of operating at approximately 200 feet of total dynamic head (TDH),and a 6”force main requires a pump capable of operating at approximately 150 feet TDH. 4.Electrical Components Electrical equipment is in good condition.The pump station utilizes a NEMA-4 control panel.However,for operation during power failure,the system is lacking an independent electric generator capable of operating the pumps in case of an emergency.The Town currently relies on a single portable generator in times of emergency,which will make it difficult to balancing flows between pump stations.It is recommended that the existing controls be replaced and relocated along with the generator installation to allow for improved venting and to accommodate the parking area.The system will also require the addition of an automatic transfer switch that is service rated to comply with National Electric Code requirements,as well as a temperature regulating device and ventilation to control temperatures within the cabinet and prevent overheating of the equipment.Adding these components will relieve stress on the system. 5.Flow Measurement Ten State Standards require that pumping stations with a 350 gpm or greater design peak hourly flow contain suitable devices for measuring and recording wastewater flows.The Forest Home Pump Station does contain flow monitoring equipment;however,it is aged and out of date.The Town should replace the flow meter in the pump station to obtain more accurate metering data. 6.Emergency Storage The Ten State Standards require that the pump station have emergency pumping capability unless on-system overflow prevention is provided by adequate storage capacity.A 7 • • • • • • • • Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 generator should therefore be installed and must have sufficient capacity to start up and maintain the total rated running capacity of the station. IV.PROPOSED IMPROVEMENTS A.Alternate Analysis -Do Nothing The “do nothing”alternative is presented as a baseline against which other alternatives are compared.The current pumps are not operating near their BEP,which would lead to increased wear and tear.They experience excessive starts and stops,further decreasing their useful life. The existing force main is near the end of its useful life,has experienced breaks,and shows evidence of I/I.Therefore,doing nothing leaves the system vulnerable to sudden failure and puts the health and safety of the Forest Home community and upstream users at risk. B.Recommended Actions 1.Pump Station Improvements This alternative explores replacing aged and inadequate infrastructure within the pump station. Understanding strategic improvements to the pump station and relevant infrastructure will save the Town operation and maintenance costs in the long run.Additionally,critical modifications can reduce the impact of the system on the environment by decreasing risk for sewer overflow and flooding,as well as energy consumption associated with pumping rates. The proposed improvements include: Resetting the wet well low level to reduce effective volume to meet the 30-minute maximum fill time requirement, Pump replacement, Bringing electrical components into compliance and putting in place a backup generator for emergency use, Replacing and relocating the existing pump controls, Replacing the deteriorated access hatch, Replacing the valve vault, Replacing the flow meter,and Installing a new manhole before the existing wet-well to eliminate disruptions to the intersection when bypass pumping into the manhole currently located within the nearest intersection. 2.Force Main Rehabilitation The system was originally constructed in the 1970s and is nearing the end of its service life. There have been two instances of force main breaks in recent history.It is recommended the force main be replaced with 4-inch DIP. 3.Infiltration and Inflow I/I studies were outside the scope of this project;regardless,due to the age and condition of the observed segments of the collection system,it is recommended that the Town pursue an I/I study in the future to reduce unnecessary flows to the pump stations and wastewater treatment facilities. 8 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 C.Cost Estimate Pump station improvements and force main replacement were considered as means to improve existing infrastructure,reduce extraneous flows,and extend the life of the system. The expected cost for pipe bursting of the existing 4”force main,in 2022 dollars is approximately $910,167 as shown in Table 3,which is the recommended improvements.An alternate cost estimate has been provided in Table 4,using open-cut method to install the force main instead of pipe bursting. Table 3:Cost Estimate COSTS SubtotalsItemNo.Unit $/Unit Total $66,888GENERALCONDITIONS Bonding (2.5%)$15,926 $15,926LS1 Supervision (2%)$12,740 $12,740LS1 Mobilization (3%)$19,111 $19,111LS1 Maintenance and Protection of Traffic (3%)$19,111 $19,111LS1 $209,000PIPELINEREPLACEMENTIMPROVEMENTS New 4"Diameter Pipe Bursting $125 $133,5001068LF Sending and Receiving Pits $100 $9,000SY90 Temporary 4”HDPE Bypass Piping/Road Crossing $55 $60,5001100LF $3,000 $6,000ConnectiontoExistingEA2 $152,865ELECTRICAL&EQUIPMENT New Control Panel/Electrical Panel $88,865 $88,865LS1 New Meter and Electrical Service $18,000 $18,000EA1 Automatic Transfer Switch $9,500 $9,500LS1 Backup Emergency Generator $36,500 $36,500LS1 $275,178PUMPSTATIONREHABILITATION&IMPROVEMENTS Effluent Pumps/Rails/Sensors $52,338 $104,676EA2 Asphalt Patching /General Restoration $30,000 $30,000LS1 Base Elbows &Piping Accessories $48,702 $48,702LS1 Replace Wet Well Hatch/Cover $12,000 $12,000EA1 Replace Valve Pit $45,500 $45,500LS1 Manhole on GravitySewer -P.S.Bypass Plumbing $22,000 $22,000LS1 Bollards $1,200 $4,800EA4 Wet Well Vent Improvement $2,000 $2,000LS1 Concrete Slab for Generator $5,500 $5,500LS1 Subtotal Construction Costs (2022 Dollars)$703,931 Engineering,Legal,Administrative (9.2%)$65,450 Project Contingency (20%,2022)$140,786 $910,167TOTALESTIMATEDPROJECTCOST 9 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 Table 4:Cost Estimate Alternate COSTS SubtotalsItemNo.Unit $/Unit Total $88,146GENERALCONDITIONS Bonding (2.5%)$17,629 $17,629LS1 Supervision (2%)$14,103 $14,103LS1 Mobilization (3%)$21,155 $21,155LS1 Maintenance and Protection of Traffic (5%)$35,259 $35,259LS1 $277,140PIPELINEREPLACEMENTIMPROVEMENTS 4"Diameter HDPE Open-Cut $155 $165,5401068LF Asphalt Restoration (5’wide x 1,068 ft)$75 $45,000SY600 Rock Removal Contingency $80 $64,000CY800 Clay Check Dams $650 $2,600EA4 $152,865ELECTRICAL&EQUIPMENT New Control Panel/Electrical Panel $88,865 $88,865LS1 New Meter and Electrical Service $18,000 $18,000EA1 Automatic Transfer Switch $9,500 $9,500LS1 Backup Emergency Generator $36,500 $36,500LS1 $275,178PUMPSTATIONREHABILITATION&IMPROVEMENTS Effluent Pumps/Rails/Sensors $52,338 $104,676EA2 Asphalt Patching /General Restoration $30,000 $30,000LS1 Base Elbows &Piping Accessories $48,702 $48,702LS1 Replace Wet Well Hatch/Cover $12,000 $12,000EA1 Replace Valve Pit $45,500 $45,500LS1 Manhole on GravitySewer -P.S.Bypass Plumbing $22,000 $22,000LS1 Bollards $1,200 $4,800EA4 Wet Well Vent Improvement $2,000 $2,000LS1 Concrete Slab for Generator $5,500 $5,500LS1 Subtotal Construction Costs (2022 Dollars)$793,329 Engineering,Legal,Administrative (8.2%)$65,450 Project Contingency (20%,2022)$158,665 $1,017,444TOTALESTIMATEDPROJECTCOST 10 Town of Ithaca 3367-001 Engineering Report September 2021/Revised February 2022 V.PROJECT SCHEDULE An anticipated project schedule is summarized in Table 5.The schedule is subject to change based on funding availability and receipt of relevant agency approvals. Table 5:Project Schedule Engineering Report January 2022 Final Design/Permitting March 2022 Regulatory Submission March 2022 July 2022StartConstruction Project Closeout September 2022 VI.CONCLUSION The Forest Home Pump Station is owned and operated by the Town of Ithaca and conveys wastewater to be treated in the IAWWTF.The system was constructed in the 1970s and since then has experienced degradation resulting in increasingly unreliable infrastructure. Hunt inspected the Forest Home Pump Station and associated collection system for structural deficiencies and evidence of I/I in August of 2021.Recommendations for improvements were developed based on results of inspections. The results of the field inspections and flow monitoring data revealed several deficiencies within the Forest Home System.The data suggest that the current pumps are operating at a point significantly different from their BEP,and the force main is aged and starting to experience failures. Therefore,it is recommended that various components of the system be rehabilitated and replaced to improve system efficiency.The improvements will include reduction in effective volume of the existing wet well,replacement of the force main and all associated fittings,and replacement of both pumps to reduce the number of pump cycles.It is also recommended that a permanent backup generator be procured,an automatictransfer switch be installed,and the pump controls be replaced and relocated order to comply with current electrical standards.The pump station should also be improved by replacing the access hatch,valve vault,and flow meter,as well as installing a new manhole before the wet-well tofacilitate bypass pumping.The estimated cost for the recommended capital improvement project is approximately $910,167. 11 Town of Ithaca Forest Home Pump Station Improvements HUNT 3367-001 Engineering Report APPENDIX A Service Area Map McIntyre Pump Station Caldwell Hill Pump Station TOWN OF ITHACA FOREST HOME PS#1 SERVICE AREA\SEJEORMRL'A ..«4 CF'MHR- [SqLP COURSE SEgVICi'RPAPj /DISCHARGE MANHOLE V*r : LEGEND-MUNICIPAL BOUNDARY TAX PARCELS SANITARY SEWER PRESSURIZED MAIN GRAVITY MAIN PRIVATE MANHOLE TOI PUMP STATION PRIVATE MAIN FOREST HOME PS*i SERVICE AREA 4-F]MAP CREATED:5/24/2021 12 09 PM BY TOWN OF ITHACA ENGINEERING DEPT SOURCE:BOLTON POINT TOI ENGINEERINGNYSG1SCLEARING HOUSE ALL LOCATIONS AND BOUNDARIES ARE APPROXIMATE. 0 500 1,000 2,000 3,000Feet Town of Ithaca Forest Home Pump Station Improvements HUNT 3367-001 Engineering Report APPENDIX B Townwide Sanitary Sewer System Study (Larson Design Group, 2019) Location Pump #Avg. Run Time/Day (Hrs.)Drawdown Rate (GPM)Avg. Flow (GPD)Length (ft)Diameter (in)Static Heat (ft)TDH (ft)**# Air Release Valves# Clean-outsPump Model HP ImpVoltage/PhaseDate InstalledWet WellBurns Way* 1 0.1 126.9 1,1313127.180-5025 10 462 230/120.274.09593127.181-011110488230/1Total2,089321457.761.20019776' DIACaldwell Hill* 1 1.6 104.7 10,3233085.182-0042 2.4 436 230/121.688.88,6693085.182-21802.4436230/1Total18,992370412.315.20019776' DIAEast Shore Drive 1 1.6 84.6 8,3463102.180-2973 5 435 230/321.070.54,4133102.180-????5436230/3Total12,7593,00348.924.52219876' DIAForrest Home #1* 1 1.1 278.0 17,8003152.181-8298 20 452 230/321.1254.916,6223152.181-276720432230/3Total34,4221,068697.3104.60019776' DIAMcIntyre 1 0.1 158.6 9313127.182-0047 10 484 230/320.1158.61,1713127.182-004710484230/3Total2,101747433.646.10019776' DIAPenny Lane 1 0.2 91.8 9973102.090-0995 5 464 230/120.191.87733102.090-80045433230/1Total1,770562437.540.90019835' DIASouthwoods 1 0.8 106.9 4,9453152.181-4025 23 267 480/321.0106.96,5053152.181-402523267480/3Total11,4502,3214174.9193.50020049' x 9' squareWaldorf 1 0.6 543.0 20,2103171.185-0355 30 454 230/320.9621.833,0033171.185-035530454230/3Total53,2144,362842.968.02419918' DIAWonderland 1 0.3 676.8 13,2393152.091-9003 20 432 230/320.3707.113,6003152.091-900320432230/3Total26,8391,180632.874.51119918' DIA*Drawdown rates based off of the second field verifcation**Total Dynamic Head based on Hazen Williams calculation at measured drawdown rate (single pump operating)Pump StationPump Info.Force MainEstimated FlowTown of IthacaTownwide Sanitary Sewer System StudySanitary Pump Station InformationLarsonDesignGroup•YourVision.MadeReal. TOWN OF ITHACA - - 34 - - SANITARY SEWER SYSTEM STUDY DRAFT – February 2019 EXECUTIVE SUMMARY reduce energy costs. Drawdown and inflow rates were measured a second time at this station to confirm the measurements noted above. The Homestead collection system is located north of the State Street system near Belle Sherman Elementary School. It is a small system that serves 13 residential sewer units and consists of 6 manholes and approximately 970 linear feet of 8” gravity main. Table 3.6. East Hill Service Area System Statistics State Mitchell units 7185259Number of Manholes ft11,40013,30055,400Gravity Main Existing Customer Stats 11172565# Customers (Accts) 10349552# Res Customers 82313# Non-Res Customers gp16,10988,06898,0364Q_2018 Avg Daily Water Use d Oct 2018 Flow Monitoring Average Flow gpd10,481107,183171,072 gpm774119 gpm-373935Peak Flow Average Dry Flow -gpd107,183130,246 gpm-7490 gpm-142181Peak Dry Flow -82%75%Dry Weather Accounted for Flow -5.0110.34Wet Weather Peaking Factor -1.912.00Dry Weather Peaking Factor Future Build Out gpd519207,0708,091Existing Infill Flow gpd720189,000140,584Future Development Flow Model Total Flow gpm-13.322.4Infiltration gpm-4621508Peak Inflow gpm-129159Existing Domestic Peak Flow gpm-708399Future Peak Domestic Flow gpm-6041689Existing Modeled Peak Flow gpm-1,1831,930Future Modeled Peak Flow Original portions of the Mitchell collection system were reportedly constructed in 1970. This system consists of 85 manholes and approximately 13,300 linear feet of 6” to 8” gravity main. It serves over 400 Forest Home TOWN OF ITHACA - - 35 - - SANITARY SEWER SYSTEM STUDY DRAFT – February 2019 EXECUTIVE SUMMARY sewer units, most of which are non-residential customers including the East Hill Plaza, Cornell facilities, and multiple apartment complexes including the Maplewood housing development. The Mitchell collection system accounts for about 6% of the Town’s average daily flow conveyed to the IAWWTF. The Forest Home collection system was reportedly installed in 1961 and contains 71 manholes, 5 pump stations, and approximately 11,400 linear feet of 8” to 10” gravity main. It serves over 100 sewer units, most of which are residential. Two small Town-owned pump stations located within the system serve one to three homes each. These small pump stations were not analyzed as part of this study due to the insignificant impact they have on the system. Less than 1% of the Town’s average daily flow conveyed to the IAWWTF is produced by Forest Home. The Caldwell Hill pump station serves approximately 15 users on the southern side of Fall Creek, including the Cornell water treatment plant. It was constructed in 1977 and consists of two 2.4 horsepower pumps and nearly 400 linear feet of 4” force main. It operates an average of 3.2 hours per day and pumps approximately 19,000 gallons of flow each day. Based on drawdown readings and system curve calculations conducted, the pump selection at Caldwell Hill appears to be appropriate for the given conditions, but the pumps seem to be operating far below the published pump curve. Drawdown and inflow rates were verified, and the same results were produced. The pumps may be operating below the accepted values due to pump wear and/or other factors such as trapped air or build up in the force main. It is recommended that the Town verify flow rates and measure operating pressure of the force main at this pump station to better diagnose the potential issue at this station. The McIntyre pump station is located in the southwest corner of Forest Home, near the Cornell Botanic Gardens. It services approximately 20 users located on the southwestern side of Forest Home. This station was installed in 1977 and has two 10 horsepower pumps connected to nearly 750 linear feet of 4” force main. The station runs an average of 0.2 hours per day and conveys over 2,000 gallons of flow each day. Based on drawdown readings and system curve calculations conducted, the pumps seem to be operating far below the published pump curve. It is recommended that the Town verify flow rates and measure operating pressure of the force main at this pump station to better diagnose the potential issue at this station. A published efficiency curve was not available for this pump. The valve vault associated with this pump station does not drain. It is recommended that this issue is resolved to reduce corrosion and avoid maintenance issues. The Forest Home #1 pump station is the largest station located in Forest Home and services the entire Forest Home area, including receiving discharge from the Caldwell Hill and McIntyre pump stations. This station was installed in 1977 and consists of two 20 horsepower pumps that convey approximately 35,000 gallons of flow each day. Similar to the Burns Way pump station, the pump selection for Forest Home #1 appears to be less than optimal, as the pumps operate approximately 600 gpm less and 40 ft of TDH above their BEP. Drawdown and inflow rates were measured a second time and similar results were obtained. Operating pumps at a point significantly different from the BEP can increase operating and maintenance costs while decreasing pump life. When drawdown and inflow rates were measured the second time, it was observed that the seal located at the elbow on the discharge side of the pumps were both significantly TOWN OF ITHACA - - 36 - - SANITARY SEWER SYSTEM STUDY DRAFT – February 2019 EXECUTIVE SUMMARY leaking. This caused a significant amount of turbulence as the pumps were running. It is recommended that these seals are replaced to ensure no further damage is done to the pumps and/or the force main. 3.4.6 NORTHEAST The Hanshaw, Texas, Simsbury, Lexington, Winthrop, and Burleigh systems serve sewer customers located in the northeast region of the Town. Summary statistics for both systems are presented in Table 3.7. See G-series exhibits in Section 5 for mapping and general modeling results for this region. The Hanshaw collection system is located in the northeast region of the Town. It was reportedly installed in 1959 with improvements made in 1964. It consists of 220 manholes and over 51,000 linear feet of 8” to 10” gravity main. It serves nearly 720 sewer units with several large customers including TST BOCES and the Childcare Center. This system conveys approximately 75% of the Town’s average daily flow to the Village of Cayuga Heights Wastewater Treatment Plant (VCHWTP). The Texas collection system is located north of the Hanshaw system. It was reportedly installed in 1959 with improvements made in 1964 and consists of 17 manholes along with nearly 4,500 linear feet of 8” gravity main. It serves 49 sewer units, the majority of which are residential customers. Approximately 10% of the Town’s average daily flow conveyed to the VCHWTP is produced by this system. The Simsbury collection system is located north of the Texas system and consists of 12 manholes and approximately 3,000 linear feet of 8” gravity main. It serves 48 sewer units, all of which are residential. Approximately 5% of the Town’s average daily flow to the VCHWTP is conveyed through this system. The Winthrop collection system is broken down into three sub-systems for the purpose of flow metering: Winthrop, Burleigh, and Lexington. The Winthrop system consists of 13 manholes and approximately 3,600 linear feet of 6” to 8” gravity main. This system serves 55 sewer units including Northeast Elementary School and Dewitt Middle School. The Burleigh collection system is located just north of the Winthrop system. It consists of 19 manholes and nearly 3,500 linear feet of 6” to 8” gravity main. It conveys flows from the Village of Lansing and serves over 200 Town of Ithaca sewer units, including the Warrenwood Apartments. The Lexington collection system contains 12 manholes and 2,600 linear feet of 8” gravity main. It serves 35 residential sewer users and is the northernmost system in the northeast region of the Town. Together, these three sub-systems make up the Winthrop collection system which conveys approximately 10% of the Town’s average daily flow to the VCHWTP. TOWN OF ITHACA - - 17 - - SANITARY SEWER SYSTEM STUDY DRAFT – February 2019 EXECUTIVE SUMMARY water use data for the third and fourth quarter of 2018 indicate significantly lower averages, as presented in Table 2.2. Table 2.2. Mean and Median Quarterly Water Usage 3Q 2018 4Q 2018 Mean gpd per 1 family residential 115 107 Median gpd per 1 family residential 104 100 Mean gpd per 2 family residential 167 173 Median gpd per 2 family residential 150 157 Mean gpd per sewer unit for apartments 84 107 2.4.1 FUTURE BUILD OUT ANALYSIS METHODOLOGY In order to classify parcels according to the possibility of being provided future sanitary sewer server and potential development type, each Town parcel was assigned one of the buildout classifications listed below and a future use estimate (i.e., an estimate of daily average rate of sanitary sewer generation) was generated as described. No Future Sewer: This classification was assigned to parcels that are not likely to be served by Town sanitary sewer in the future due to one of the following: · Parcels that are zone AG or C and/or fall completely within Rural/Agricultural or Natural Open character districts · Parcels or parcel groups that are significantly isolated from existing sanitary sewer (e.g., the group of MDR-zoned properties along Poole Rd at the western town boundary). · Parcels that are existing customers, but water use data is included in a separate parcel (e.g., HOAs and townhomes). · Parcels that discharge to Cornell’s private collection system. · Miscellaneous others (see notes field) Existing Sewer Customers: Existing sewer customers were assigned one of the five following classifications: · Existing: Existing sewer customers that do not fall within any of the categories below. The future use estimate for these properties is equal to the 4th quarter 2018 metered water use. · Existing Increase: This classification was assigned to parcels that are currently served by Town sanitary sewer but have an average metered water usage less than 20 gpd. These parcels may be vacant or underutilized and it is likely that sanitary sewer generation may increase in the future. The future use estimate for these properties was set as 180 gpd per residential unit, with the number of residential units determined by property class. · Existing Redeveloped: This classification was assigned to parcels that are currently served by Town sanitary sewer and appear to have the ability to be subdivided (i.e., infill across parcels TOWN OF ITHACA - - 18 - - SANITARY SEWER SYSTEM STUDY DRAFT – February 2019 EXECUTIVE SUMMARY already served by Town sanitary sewer). Extent of potential maximum redevelopment, in terms of maximum residential units, was estimated based on parcel size, frontage, parcel shape, location of existing structures and water bodies, and zoning. · Existing Cluster: This classification was assigned to parcels that contain a structure that is currently served by Town sanitary sewer and appear to have the ability to be subdivided, where the area that may be subdivided is in a clustered development area, as described below. · Custom Growth Projection: This classification was assigned to large existing customers such as campuses and business parks that have a significant potential for future growth across the parcel currently served by Town sanitary sewer. See Table 2 in Appendix H for future growth projections and justifications. Potential Future Sewer Customers: Potential Future sewer customers were assigned one of the four following classifications: · Future Infill Developed: This classification was assigned to currently developed parcels that are not currently served by Town sanitary sewer, do not fall within a cluster development, and do not appear to have the ability to be subdivided (based on zoning, acreage, frontage, and location of existing building on property). Each parcel was assigned a number of residential units based on property classification and future use was estimated based 180 gpd/residential unit. · Future Infill Redeveloped: This classification was assigned to currently developed parcels that are not currently served by Town sanitary sewer, do not fall within a cluster development, and appear to have the ability to be subdivided. Each parcel was assigned a maximum number of residential units based on zoning, acreage, frontage, and location of existing building on property, and future use was estimated based 180 gpd/residential unit. · Future Infill Undeveloped: This classification was assigned to currently undeveloped parcels that, based on their location and zoning, may be developed and served by Town sanitary sewer in the future. Each parcel was assigned a maximum number of residential units based on zoning, acreage, frontage, and location of existing building on property, and future use was estimated based 180 gpd/residential unit. See notes in future customer shapefile for assumptions made for various parcels. · Clustered Development: Large, continuous areas that span multiple parcels but fall within a common character district and zone have been grouped together for the sake of estimating maximum build out potential. Maximum development potential and future use estimations were conducted specifically for each cluster, per the descriptions below. Additional information for each cluster is summarized in Table 3 included in Appendix H. 1. Dubois East: Consists of 4 undeveloped and 5 partially developed parcels. All parcels are zoned LDR and fall within the Semi-Rural Neighborhood character district. This area includes approximately 3 existing residential units not currently served by public sanitary sewer. Build out estimate is based on 80% development across an estimated 50 open acres and an LDR zoning density of 0.689 acres per lot. This cluster would need to be served by a central pump station that would likely discharge to the existing backlot gravity main that parallels Dubois Rd to the east. Path P\9418\9418-002 TIthacaSanitary Sewer SystemStudy\GIS\ProEditor_Layouts3 aprx Wet Well Information Wet well inner diameter:6 ft Cross-section area:28.27 ft^2 Wet well bottom elevation(design):812.5 ft Top of aluminum hatch (survey):826 ft Drawdown calcuation 10/29/2018 9:15am Pump #1 Pump #2 Drawdown:1 ft Drawdown:1 ft Time elapsed:50 seconds Time elapsed:55 seconds 0.833333 min 0.92 min Drawdown volume:28.3 ft^3 Drawdown volume:28.3 ft^3 211.5 gal 211.5 gal Drawdown rate:253.8 gpm Drawdown rate:230.7 gpm Fill Rate Fill Rate Start level:2.8 ft Start level:2.8 ft End level:3 ft End level:3 ft Time elapsed:1.8 min 1.8 min Fill volume:5.7 ft^3 Fill volume:5.7 ft^3 42.3 gal 42.3 gal Fill rate:24.2 gpm Fill rate:24.2 gpm Actual Drawdown:278.0 gpm Actual Drawdown:254.9 gpm Force Main Profile Station (ft) Elevation (ft) 0 813.5 0 820.4 1,068 910.84 Town of Ithaca Forest Home #1 Pump Station - Revised Discharge to Gravity Notes Wet Well Low Water Level Start of FM 800 820 840 860 880 0 200 400 600 800 1,000 1,200Elevation (ft)Station(ft) Forest Home #1 FM 940 920 900 6" Forest Home #1 FM System and Pump Curves Static Head:97.3 ft Hazen Williams Equation: For pipe flowing full : FM Total Length:1,068 ft h=10.44(L)(Q^1.852)/(C^1.852)(d^4.8655) Assumed additional minor losses 0.05 where h = head loss (ft) additional effective length L= length of pipe (ft) Pipe: 6" DIP (Assumed Class 52)Q = flow (gpm) Inner DIA:6.28 in C = C factor for pipe C Factor:120 d = diameter of pipe (inches) System Operating Curve Discharge Flow Rate Static Loss TDH Pressure (gpm)(ft)(ft)(ft)(psi) 75 97.3 0.6 98.0 42.4 150 97.3 2.3 99.7 43.1 200 97.3 4.0 101.3 43.8 254.9 97.3 6.2 103.5 44.8 Pump #2 278 97.3 7.3 104.6 45.3 Pump #1 300.0 97.3 8.4 105.7 45.8 350.0 97.3 11.1 108.5 47.0 450 97.3 17.7 115.1 49.8 Pump Curve Flygt 3152 133 Pump Curve Flygt 3152 307 Flow TDH Flow TDH (gpm)(ft)(gpm)(ft) 101.3 116.76 55.5 97.42 651.4 76.01 823.2 58.86 890 60 BEP 1050 49 BEP 979.9 52.07 1326.7 35.5 Force main velocity (ft/s):2.88 Based on:278 gpm Forest Home #1 Pump Station - Revised 0 20 40 60 80 100 120 140 0 200 400 600 800 1000 1200 1400TDH (ft)Flow (gpm) Forest Home #1 PS -Revised Calcuated System Curve Pump Curve Flygt 3152 133 Pump Curve Flygt 3152 307 Pump #1 Pump #2 BEP_1 Town of Ithaca Forest Home Pump Station Improvements HUNT 3367-001 Engineering Report APPENDIX C Pump Cycle Time Calculations Forest Home Pump Station Calculations Effective Wet Well Storage Volume 440 gallons 105 GPM 4" Ductile Iron Pipe Inner Diameter 4.22 inches (in)160 GPM 6" Ductile Iron Pipe Inner Diameter 6.28 in 1.6 hours/day Forcemain Length 1068 feet (ft)0.1 hours/day Hazen Williams C-factor 120 -- Static Head 97.3 ft Assumed Minor Loss 5 ft Design Pump Discharge for One Pump 350 gal/min (GPM) Existing Average Forest Home Sewage Production1 7 GPM Future Average Forest Home Sewage Production1 8 GPM Peak Factor 6 -- Head Loss Scenarios2 Max Instantaneous Inflow (Future, GPM) Number of Forest Home Pumps Running Forcemain Flow Rate (GPM) 4" Forcemain Velocity (ft/s) 4" Forcemain Headloss (ft) 4" Forcemain TDH (ft) at Design Discharge 6" Forcemain Velocity (ft/s) 6" Forcemain Headloss (ft) 6" Forcemain TDH (ft) at Design Discharge Caldwell 1 Pump + Future Peak Forest Home 153 McIntyre 1 pump + Future Peak Forest Home 208 1 Caldwell + 1 McIntyre 265 1 Caldwell + 1 McIntyre + Future Peak Forest Home 313 2 Caldwell + 2 McIntyre + Future Peak Forest Home 578 2 700 16.1 265.0 367.3 38.3 140.6 242.9 Production Volume per Source (gal/hr)Existing Average Future Average Existing Peak Future Peak Forest Home 420 480 2520 2880 Caldwell 420 470 2520 2822 McIntyre (0.1 hours of operation, existing)40 45 240 269 Production Volume per Source (GPM)Existing Average Future Average Existing Peak Future Peak Forest Home 7 8 42 48 Caldwell 7 8 42 47 McIntyre 0.7 0.7 4 4 Hourly volumes were determined as follows: 1. Future values for Caldwell and McIntyre are based on 12% growth, the same growth predicted for Forest Home over the useful system life (11,720/10,481). 2. Peak flow rates are determined using a peaking factor of 6. Existing Peak Demands Inflow (GPM)Time to Empty (min)Time to Fill (min) Cycles/hr Caldwell + Forest Home 84.0 1.7 5.2 8.7 McIntyre + Forest Home 46.0 1.4 9.6 5.4 Caldwell + McIntyre 46.0 1.4 9.6 5.4 Caldwell + McIntyre + Forest Home 88.0 1.7 5.0 9.0 Future Peak Demands Inflow (GPM)Time to Empty (min)Time to Fill (min) Cycles/hr Caldwell + Forest Home 95.0 1.7 4.6 9.4 McIntyre + Forest Home 52.5 1.5 8.4 6.1 Caldwell + McIntyre 51.5 1.5 8.5 6.0 Caldwell + McIntyre + Forest Home 99.5 1.8 4.4 9.7 Existing Average Demands Inflow (GPM)Time to Empty (min) Time to Fill (min)Cycles/hr Caldwell + Forest Home 14.0 1.3 31.4 1.8 McIntyre + Forest Home 7.7 1.3 57.4 1.0 Caldwell + McIntyre 7.7 1.3 57.4 1.0 Caldwell + McIntyre + Forest Home 14.7 1.3 30.0 1.9 Future Average Demands Inflow (GPM)Time to Empty (min) Time to Fill (min)Cycles/hr Caldwell + Forest Home 15.8 1.3 27.8 2.1 McIntyre + Forest Home 8.7 1.3 50.3 1.2 Caldwell + McIntyre 8.6 1.3 51.2 1.1 Caldwell + McIntyre + Forest Home 16.6 1.3 26.5 2.2 1. Based on 2018 data from Larson Design Group Report 2. All Forest Home flows based on future peak values McIntyre Pump Station Average Runtime McIntyre Pump Station Discharge Caldwell Pump Station Discharge Caldwell Pump Station Average Runtime 1 10.635073.48.0 175.7 3.6 112.9 Town of Ithaca Forest Home Pump Station Improvements HUNT 3367-001 Engineering Report APPENDIX D Flygt Pump Curve FLYPS2.11 (20010918)PERFORMANCE CURVE DATE PROJECT 1/1-LOAD 3/4-LOAD 1/2-LOAD POWER FACTOR EFFICIENCY MOTOR DATA COMMENTS INLET/OUTLET IMP. THROUGHLET RATED POWER ..... STARTING CURRENT ... RATED CURRENT ... RATED SPEED ..... TOT.MOM.OF INERTIA ... NO. OF BLADES PRODUCT TYPE CURVE NO ISSUE MOTOR #STATOR REV FREQ.PHASES VOLTAGE POLES GEARTYPE RATIO Performance with clear water and ambient temp 40 °C CP3152.181 HT 2002-04-02 63-452-00-8050 2 IMPELLER DIAMETER 280 mm 25-15-4AA 12YSER 10 60 Hz 3 460 V 4 ------ 0.85 86.0 % --- 0.82 87.0 % --- 0.73 86.5 % --- - /150 mm 76 mm 23 hp 142 A 29 A 1745 rpm 0.23 kgm2 1 FLOW [USgpm]HEAD[ft]POWER[hp] EFF. [%] NPSHRE [ft] 0 200 400 600 800 1000 0 20 40 60 80 100 120 0 5 10 15 20 25 30 0 10 20 30 40 50 60 70 15 20 25 30 P PPOWER LIMITDUTY POINTs:FLOW[USgpm]HEAD[ft]POWER [hp]EFF. [%]NPSH[ft] 1019 72.6 (26.0 )72.2 18.3BEP BEST EFF. POINTO*OVERALL EFF.PUMP EFF.*SHAFT POWERCURVE Operating condition per LDG Report - 230 GPM Pump Efficiency (42%)